Suat Gumussoy


Bio

Dr. Gumussoy received his B.S. degrees in Electrical & Electronics Engineering and Mathematics from Middle East Technical University at Turkey in 1999 and M.S., Ph.D. degrees in Electrical and Computer Engineering from The Ohio State University at USA in 2001 and 2004. His graduate study is focused on robust control design and time-delay systems. He worked as a system engineer in electronic self-protection system design for F-16 aircrafts at Mikes Inc., New York (2005-2007) and a software quality engineer in MATLAB control toolboxes at MathWorks, Natick (2007-2008). He was a postdoctoral researcher in Computer Science Department at Katholieke Universiteit Leuven, Belgium (2008-2011). He is currently principal control system engineer in Controls & Identification Team at MathWorks. Dr. Gumussoy's general research interests are control, optimization and scientific computing. His academic study has focused on optimization based control methods on the fixed-order robust controller design for finite dimensional and time-delay systems and their numerical implementations.

Contact Info

Address: 3 Apple Hill Drive, Natick, MA, 01760
Email: 



Software

  • Software at K.U. Leuven

    Time Delay Systems: Analysis and Control
    A bundle of software files to compute H-infinity norm, pseudospectral abscissa and to design H-infinity controller using nonsmooth, nonconvex optimization methods for time-delay plants.
  • Software at Courant Institute, NYU

    MATLAB toolbox for fixed-order controller design (HIFOO)
    Based on nonsmooth, nonconvex optimization methods, this toolbox computes the fixed-order (structured) controller for various control problems including (multi-objective) stabilization and H-infinity optimization.

Research

Publications

Book Chapters

[BC4]  S. Gumussoy and W. Michiels
          Tuning an H-Infinity Controller with a Given Order and a Structure for Interconnected Systems with Delays
          Low-Complexity Controllers for Time-Delay Systems, Advances in Delays and Dynamics (edited volume), pp. 95-110, Springer, 2014. chapter ]

[BC3]  S. Gumussoy and P. Gahinet
          Computer Aided Control System Design for Time Delay Systems using MATLAB
          Delay Systems, Advances in Delays and Dynamics (edited volume), pp. 257-270, Springer, 2013. chapter ]

[BC2]  W. Michiels and S. Gumussoy
          Eigenvalue based algorithms and software for the design of fixed-order stabilizing controllers for interconnected systems with time-delays
          Delay Systems, Advances in Delays and Dynamics (edited volume), pp. 243-256, Springer, 2013. chapter ]

[BC1]  S. Gumussoy
and W. Michiels
          Fixed-order H-infinity Optimization of Time-Delay Systems
          Recent Advances in Optimization and its Applications in Engineering (edited volume), pp. 103-112, Springer, 2010. [ preprint ] [ chapter ]

Journal Papers


[J12]  S. Gumussoy and W. Michiels
         Computation of extremum singular values and the strong H-infinity norm of SISO time-delay systems
         Automatica, vol. 54, pp. 266-271, 2015. preprint ] paper ] 

[J11]  S. Gumussoy and W. Michiels
         Root-Locus for SISO Dead-Time Systems: A Continuation Based Approach
         Automatica, vol. 48, no. 3, pp. 480-489, 2012. 
[ preprint ] [ paper ] 

[J10]
  T. D. Quoc, S. Gumussoy, W. Michiels and M. Diehl
         Combining Convex-Concave Decomposition and Linearization Approaches for Static Feedback Controller Design (Regular Paper)
         
IEEE Transactions on Automatic Control, vol. 57, no. 6, pp. 1377-1390, 2012. preprint ] paper ] 

[J9]    S. Gumussoy
         Coprime Inner/Outer Factorization of SISO Time-Delay Systems and FIR Structure of Their Optimal H-Infinity Controllers
         International Journal of Robust and Nonlinear Control, vol. 22, no. 9, pp. 981-998, 2012. 
preprint ] paper ]

[J8]    S. Gumussoy and W. Michiels
         Fixed-Order H-infinity Control for Interconnected Systems using Delay Differential Algebraic Equations
         SIAM Journal on Control and Optimization, vol. 49, no. 2, pp. 2212-2238, 2011. 
preprint ] 
paper ]

[J7]    S. Gumussoy
         Relative Stability Analysis of Closed-Loop SISO Dead-Time Systems: Non-imaginary Axis Case
         Transactions of the Institute of Measurement and Control, vol. 34, no. 4, pp. 411-421, 2011. [ preprint ] [ paper ]

[J6]    W. Michiels and S. Gumussoy

         Characterization and Computation of H-infinity Norms for Time-Delay Systems
         SIAM Journal on Matrix Analysis and Applications, vol. 31, no. 4, pp. 2093-2115, 2010. [ preprint ] [ paper ]

[J5]    S. Gumussoy and W. Michiels

         A Predictor-Corrector Type Algorithm for the Pseudospectral Abscissa Computation of Time-Delay Systems (Regular Paper)
         Automatica, vol. 46, no. 4, pp. 657-664, 2010. [ preprint ] [ paper ]

[J4]    S. Gumussoy and H. Ozbay

         Sensitivity Minimization by Strongly Stabilizing Controllers for a Class of Unstable Time-Delay Systems
         IEEE Transactions on Automatic Control, vol. 54, no. 3, pp. 590-595, 2009. [ preprint ] [ paper ]
[J3]    S. Gumussoy and H. Ozbay
         Stable H-infinity Controller Design for Time-Delay Systems
         International Journal of Control, vol. 81, no. 4, pp. 546-556, 2008. [ preprint ] [ paper ]
[J2]    S. Gumussoy and H. Ozbay
         Remarks on Strong Stabilization and Stable H-infinity Controller Design
         IEEE Transactions on Automatic Control, vol. 50, no. 12, pp. 2083-2087, 2005. [ preprint ] [ paper ]
[J1]    S. Gumussoy and H. Ozbay
         On the Mixed Sensitivity Minimization for Systems with Infinitely Many Unstable Modes
         Systems and Control Letters, vol. 53, no. 3-4, pp. 211-216, 2004. [ preprint ] [ paper ]

Conference Proceedings and Abstracts

[C23]  S. Gumussoy, B. Eryilmaz and P. Gahinet
          Working with Time-Delay Systems in MATLAB
          10th IFAC Workshop on Time-Delay Systems, Boston, USA, June 22-24, 2012. [ paper ]

[C22]  W. Michiels and S. Gumussoy
          Eigenvalue based Analysis and Controller Synthesis for Systems described by Delay Differential Algebraic Equations
          10th IFAC Workshop on Time-Delay Systems, Boston, USA, June 22-24, 2012. [ paper ]

[C21]  S. Gumussoy and W. Michiels
          Direct Strong H-infinity Norm Computation for SISO Time-Delay Systems (invited session)
          3rd International Conference on Control and Optimization with Industrial Applications, Ankara, Turkey, August 22-24, 2011. [ extended abstract ]

[C20]  D. Arzelier, G. Deaconu, S. Gumussoy and D. Henrion
          H2 for HIFOO (invited session)
          3rd International Conference on Control and Optimization with Industrial Applications, Ankara, Turkey, August 22-24, 2011. [ extended abstract ] [ paper ]

[C19]  S. Gumussoy and W. Michiels
          Fixed-order strong H-infinity control of interconnected systems with time-delay (minisymposium)
          Proceedings of the 18th IFAC World Congress, Milano, Italy, August 28-September 2, 2011. [ paper ]

[C18]  S. Gumussoy and W. Michiels
          On the sensitivity of the H-infinity norm of interconnected systems with time-delays (minisymposium)
          Proceedings of the 18th IFAC World Congress, Milano, Italy, August 28-September 2, 2011. [ paper ]

[C17]  S. Gumussoy and W. Michiels
          Continuation Based
Computation of Root-Locus for SISO Dead-Time Systems
          Proceedings of the 9th IFAC Workshop on Time-Delay Systems, 2010. [ paper ]

[C16]  S. Gumussoy and W. Michiels
          Computing H-infinity Norms of Time-Delay Systems
          Proceedings of the 48th IEEE Conference on Decision and Control, pp. 263-268, 2009. [ paper ]

[C15]  S. Gumussoy and W. Michiels
          Fixed-Order H-infinity Optimization of Time-Delay Systems
          14th Belgian-French-German Conference on Optimization, 2009. [ extended abstract ]

[C14]  S. Gumussoy and W. Michiels
          Computing the Pseudospectral Abscissa of Time-Delay Systems
          Proceedings of the 8th IFAC Workshop on Time-Delay Systems, 2009. [ paper ]

[C13]  S. Gumussoy, D. Henrion, M. Millstone and M. L. Overton,
          Multiobjective robust control with HIFOO 2.0
          Proceedings of the 6th IFAC Symposium on Robust Control Design, 2009. [ paper ]

[C12]  S. Gumussoy and W. Michiels
          Computing H-infinity Norms of Time-Delay Systems
          28th Benelux Meeting on Systems and Control, 2009. [ extended abstract ]
[C11]  S. Gumussoy, M. Millstone and M. L. Overton
          H-infinity Strong Stabilization via HIFOO, a Package for Fixed-Order Controller Design
          Proceedings of the 47th IEEE Conference on Decision and Control, pp. 4135-4140 , 2008. [ paper ]
[C10]  S. Gumussoy, M. Millstone and M. L. Overton
          Design of Fixed-Order Controllers via Nonsmooth Optimization
          SIAM Conference on Optimization, Boston, MA, 2008. [ abstract ]
[C9]    S. Gumussoy
          On the Zeros of Quasi-Polynomials with Single-Delay
          Proceedings of the American Control Conference, pp. 5282-5286, 2008. [ paper ]
[C8]    S. Gumussoy and M. L. Overton
          Fixed-Order H-Infinity Controller Design via HIFOO, a Specialized Nonsmooth Optimization Package
          Proceedings of the American Control Conference, pp. 2750-2754, 2008. [ paper ]
[C7]    S. Gumussoy and H. Ozbay
          Sensitivity Minimization by Stable Controllers: An Interpolation Approach for Suboptimal Solutions
          Proceedings of the 46th IEEE Conference on Decision and Control, pp. 6071-6076, 2007. [ paper ]
[C6]    S. Gumussoy and H. Ozbay
          Sensitivity minimization by stable controllers for a class of unstable time-delay systems
          Proceedings of the 9th International Conference on Control, Automation, Robotics and Vision, pp. 1-5, 2006. [ paper ]
[C5]    H. Ozbay and S. Gumussoy
          Remarks on H-infinity Controller Design for SISO Plants with Time Delays
          Proceedings of the 5th IFAC Symposium on Robust Control Design, 2006. [ paper ]

[C4]    S. Gumussoy and H. Ozbay
          Remarks on Strong Stabilization and Stable H-infinity Controller Design
          Proceedings of the 43rd IEEE Conference on Decision and Control, vol. 3, pp. 2621-2624, 2004. [ paper ]

[C3]    S. Gumussoy and H. Ozbay
          On Stable H-infinity Controllers for Time Delay Systems
          Proceedings of 16th International Symposium on Mathematical Theory of Network and Systems, 2004. [ paper ]
[C2]    M. Saglam, S. Ezercan, S. Gumussoy and H. Ozbay
          Controller tuning for active queue management using a parameter space method
          Proceedings of the 16th International Symposium on Mathematical Theory of Network and Systems, 2004. [ paper ]

[C1]    S. Gumussoy and H. Ozbay
          Control of Systems with Infinitely Many Unstable Modes and Strong Stabilizing Controllers Achieving a Desired Sensitivity
          Proceedings of the 15th International Symposium on Mathematical Theory of Network and Systems, pp. 1-10, 2002. [ paper ]

PhD Thesis

S. Gumussoy
Optimal H-infinity controller design and strong stabilization for time-delay and mimo systems (ohiolink)
Doctor of Philosophy, Ohio State University, Electrical Engineering, 2004.

Webinar

[W]    S. Gumussoy
         MathWorks, December 4, 2012.

Blog

[B]     P. Gahinet, S. Gumussoy, E. Korkut and M. Cuenant
         MathWorks, April 3, 2014.